名词
中文翻译：污点
同义词：
['mark', 'stain', 'smudge', 'spot']
例句：
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1. The paint on the wall has a lot of visible stains.
墙上的油漆有很多明显的污点。
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2. The book had several stains from spilled ink.
这本书上有好几处被墨水溅到的痕迹。
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3. The stain on the shirt is quite noticeable.
衬衫上的污渍相当明显。